















🔔 Never miss a knock, rain or shine!
The AVANTEK Wireless Doorbell CB-21 offers a robust 1000 ft wireless range with IP55 waterproof and dustproof protection, ensuring reliable use in all weather conditions. Featuring 52 customizable melodies and 5 volume levels up to 115 dB, it delivers clear, rich sound. Powered by ultra-low consumption CR2032 batteries with up to 3 years lifespan, this cordless door chime kit includes 2 push buttons and easy no-wiring installation, perfect for front, back, or multiple entrances.













| ASIN | B07KG9T886 |
| Batteries | 2 CR2 batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Best Sellers Rank | 19,872 in DIY & Tools ( See Top 100 in DIY & Tools ) 79 in Door Bell Kits |
| Brand | AVANTEK |
| Certification | CE, FCC and RoHS |
| Colour | Mini (Black) |
| Customer Reviews | 4.6 4.6 out of 5 stars (5,158) |
| Date First Available | 8 Jan. 2019 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Guaranteed software updates until | unknown |
| Included Components | 2 × Transmitters (CR2032 batteries included), 1 × Plug-in receiver, 2 × Adhesive tapes, 1 × Screwdriver, 4 × Screws, 4 × Anchors, 1 × User manual |
| Item Weight | 190 g |
| Item model number | CB-21 |
| Manufacturer | AVANTEK |
| Material | ABS |
| Package Dimensions | 13.2 x 9.4 x 6 cm; 190 g |
| Part Number | CB-21 |
| Power and Plug Description | AC & Battery |
| Special features | ① Wireless Doorbell ② 2 Remote Buttons Can Have Different Tones, Suitable for Front Back Doors Entrance Ways ③ IP55 Waterproof Dustproof ④ 1000 Feet/300 M Operating Range ⑤ 5 Adjustable Volume Levels with 52 Chimes ⑥ Mini Sized ⑦ Electrical Doorbell |
| Specific Uses | All of the following AVANTEK doorbells with plug-in receivers can be paired with each other: CB-11/CW-11/CB-12/CW-12/CB-21/CW-21/D-3B/D-3W/D-3G/D-3F/D-3C/DB-21/DB-11/DW-21 (For orders purchased before 2021, it is best to contact us to inquire whether they can be paired.) |
| Voltage | 3 Volts |
M**K
Excellent piece of kit. Just plug and play
Excellent piece of kit. Just plug and play. Still working great on original battery after two years of use. Range is excellent too.
T**Y
Great and affordable
A simple piece of kit, reasonably priced and looks dead smart. The plug in part is nice and thin so actually was able to be plugged in behind a unit making it invisible but still easily heard. The push doorbell part is smart, fits nicely and the large adhesive pad looks like it will not be moved. Volume control is great, can be heard all over the house quite easily. The only slight niggle is having to wade through the sheer number of chimes to find something which sounds like a doorbell - I mean come on, how many people really need their home doorbell to play happy birthday or an unimaginable number of Christmas tunes! Sometimes it's ok to make things simple!
A**A
Great bell, easy to install, small minor caveat
Great bell , works as expected, easy to install and volume is rather loud; extensive choice of chimes/songs, mainly making the kids laugh (we've put the receivers out of reach 😅 ). Small caveat, the ring around the bell button and the bell icon on the actual button and receivers does not light up (contrary to what the pictures in the description might suggest). I thought the blue circle would be visible in the dark so visitors could find the bell more easily, but that is not the case.
A**R
Very simple setup
Excellent product that works exactly as intended. We live in a townhouse so the family room is upstairs. Our doorbell worked occasionally and most deliveries came to our back door which didn't have a bell. This meant we missed most parcels. Enter this AVANTEK setup. Two bells with adhesive pads and one receiver. Receiver is loud and small, set to a normal bell as default and the pairing process took seconds. I got what I wanted and I am delighted. Colour is also pleasant on my grey UPVC doors. Can't comment on battery life as it's just been installed, but it really was so easy to setup and use.
B**D
Excellent value
I looked at several similar products and settled on this one because it was attractive in appearance and price. Reviewers also rate the build quality highly. I ordered the doorbell with two ringers, plus a separate ringer as I wanted three. There is no package of doorbell with three ringers. I wanted two downstairs and one upstairs because we were getting fed up with not hearing the doorbell while not close to the front door. Set-up took about ten minutes. The bellpush stuck firmly with the supplied adhesive pad. If this gives out in time, I'll use the supplied screws. It's been in use for about ten days and it's fully lived up to expectations. The signal from the bellpush has no problem reaching the upstairs ringer. Wherever you are in the house, you hear it. You can adjust the volume, and at its loudest, it is very loud. There is also a decent variety of rings. Some of the options are quite useful as they ring for longer. Sound quality is not bad from a smallish speaker. It's not hifi, but then the old analogue doorbell wasn't either, and it's certainly not tinny. Doorbell and ringers look smart too. I can't comment yet on how well the bellpush stands up to weather or how long the whole kit will last.
A**N
What's not to like???
Had an old wireless doorbell that had started to get intermittent so looked around for alternatives. The usual Freidland and Byron ones seemed pretty expensive for what they were. Anyway this Avantek set has a lot of good reviews and is reasonably priced so I thought I'd give it a go. Very pleased with it. The transmitter is nice, probably a bit wider than a standard doorbell but at least you know it will cover any holes left from the old one. I screwed it on with the supplied screws - there are screw hole points on the back cover (the cover is removed with the included "key"), they just need pushing out with a bradawl or small crosspoint screwdriver, then pre-drill the door frame with a 2.5mm or 3mm drill bit. The battery in the transmitter has a clear plastic tag to stop the battery discharging. It is quite tight, I used tweezers to remove it. The receivers both worked fine. I did the pairing to the transmitter, easy enough. Decently loud and nice to have two so I've got one in the hallway and one in the kitchen. Lots of [animal] sounds and tunes to choose from but ended up using the faithful "ding dong ding dong" sound, as it gets a bit embarrassing answering the door with a Cossack dance still playing in the background! Nice that the button on the transmitter lights up blue when pressed, so the person at the door knows it is working. All in all, a great piece of kit :-)
M**H
Nice and loud.
It appears to be of reasonable quality. Not a heavy solid kind of gadget but good enough. It is easy to set up. I the bell is an easy peel and stick and look s very smart next to my new black front door. The two wireless boxes are quite big and I had to move one of them because I could not fit another plug into the double socket next to it. (More to do with the fact the other plug was a larger than normal plug). There are a lot of sounds to choose from, some rather funny quirky ones, i just could not bring myself to have a cock crowing as a door bell! I rather liked the knocking on the door one, but it wasn’t very loud or noticeable. So I went for one of the tunes. I placed one in my living room and one upstairs on the landing. The next thing was to actually try and get them in tune with one another! It took a bit of jiggling with my husband standing with one and me at the other and a sort of one two three go.....to get them paired. You don’t have to do this, you can have a different sound on each box. However, believe me it’s not good to hear two different sounds going off at the same time nor is it good having the same tune slightly out of cinque being belted out, it’s bad enough with the tune I’ve chosen, loud enough to be heard all over the house and outside, much to the shock of the person standing at the door!!
A**A
Sehr gut paast fur haus und Grarage.
M**N
Easy to install and very reliable. I place the bells outside both gates and have been very satisfied with the product. The sound is excellent too! As clear as a bell!
G**3
Cet élément était à côté d'une sonnerie (X-Sense) et je croyais qu'elle appartenait a celle-ci or c'est une Avantex et donc elle ne fonctionne pas. Avez-vous des émetteurs séparés pour (X-Sense ) ou faut-il l'acheter l'ensemble, car je n'en ais pas trouvais dans votre catalogue. Cordialement
P**T
On verra à l'usage
T**S
Vielversprechender Hersteller. Leider nicht zu verwenden ohne Adapter. Empfänger welcher in die Steckdose gesteckt werden muss hat 3 Steckernasen.
Trustpilot
1 month ago
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